<wicket:panel xmlns:wicket="http://www.w3.org/1999/xhtml">
  <form wicket:id="form">
    <table wicket:id="table" class="table table-hover table-sm"></table>
    <input type="submit" wicket:id="submit" style="display: none;"/>
  </form>
  <b wicket:id="error" style="color:red"></b>
</wicket:panel>